Pet bed



FIG. 1 is a perspective view of a pet bed showing our new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines are for llustrative purposes only and form no part of the claimed design. 

The ornamental design for a pet bed, as shown. 